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Science 14 December 1973:
Vol. 182. no. 4117, pp. 1129 - 1132
DOI: 10.1126/science.182.4117.1129
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Articles

Premonitory Variations in S-Wave Velocity Anisotropy before Earthquakes in Nevada

Indra N. Gupta 1

1 Mackay School of Mines, University of Nevada, Reno 89507

Application of nonhydrostatic stress to rock induces velocity anisotropy, causing the S wave to split into two components traveling with somewhat different velocities. Large premonitory changes in the extent of S-wave splitting have been observed for two earthquakes in Nevada. Observations of the difference between the two S-wave velocities may provide a simple method for pedicting earthquakes.


THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Comments on papers about shear-wave splitting in dilatancy-induced anisotropy by I. N. Gupta and by A. Ryall and W. U. Savage.
S. CRAMPIN, R. EVANS, M. DOYLE, and J. P. DAVIS (1981)
Bulletin of the Seismological Society of America 71, 375-377
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Temporal stability of P-velocity anisotropy before earthquakes in central California.
J. A. STEPPE, W. H. BAKUN, and C. G. BUFE (1977)
Bulletin of the Seismological Society of America 67, 1075-1090
   Abstract »    PDF »
Earthquake precursors.
T. RIKITAKE (1975)
Bulletin of the Seismological Society of America 65, 1133-1162
   Abstract »    PDF »
Premonitory changes in ts/tp due to anisotropy and migration of hypocenters.
I. N. GUPTA (1975)
Bulletin of the Seismological Society of America 65, 1487-1493
   Abstract »    PDF »
Premonitory seismic-wave phenomena before earthquakes near Fairview Peak, Nevada.
I. N. GUPTA (1975)
Bulletin of the Seismological Society of America 65, 425-437
   Abstract »    PDF »
Dilatancy and spatial distribution of aftershocks.
I. N. GUPTA (1974)
Bulletin of the Seismological Society of America 64, 1707-1713
   Abstract »    PDF »
S-wave splitting: Key to earthquake prediction?.
A. RYALL and W. U. SAVAGE (1974)
Bulletin of the Seismological Society of America 64, 1943-1951
   Abstract »    PDF »
Comments on "S-wave splitting: A key to earthquake prediction?" By A. Ryall and W. U. Savage.
I. N. GUPTA (1974)
Bulletin of the Seismological Society of America 64, 1997-2001
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